FYI - Clover's flower pins say "Head is not heat resistant. Do not apply iron directly." Considering that I generally keep my iron at a hot setting (cotton/linen), I wouldn't want to use any plastic headed pin.

I purchased a box of 300 pins about a month ago, made by a known company. When I tried to use them they wouldn't go through the fabric. I e-mailed the company, thinking that maybe it was a bad batch. They sent replacements and I couldn't believe they were the same way. I gave up. Now I have 600 flower top pins that won't go through butter. Will not purchase this brand again, needless to say.

Most pins - Clover's flower head ones included - come in different thicknesses to address different jobs. A thick pin, meant for heavy fabrics, wouldn't work well on lighter fabrics. The flower head ones are supposed to go through the machine easier, but aren't we all taught that we really shouldn't be sewing over them anyhow? Whatever, lol. For those who like them, just be sure to get the finer ones. But also remember, there are lots of manufacturers of the flower head ones, too.

Another brand I've seen recommended is Iris. I didn't like those at all. Like many things, we've all got our preferences.

I am always on a quest for the finest pins in the store. Many of the pins at J's are dull. I never had the experience of pins melting. That could be a disaster! I think I will try to buy some of the flower pins.

I get the flower and button pins from Nancy's notions. They have never melted, but they are thicker than the silk pins.

These are my favorite as well!
I had used some flower head pins a few weeks ago and forgot they weren't my glass head ones. Needless to say, I ironed over the top on one. The flower part melted and came off on the bottom of my iron. Ya, those have been 'put away'.